feat: add cloud gtm injection

vite.config.mts

@@ -37,6 +37,15 @@ const VITE_OG_DESC =
   'Bring your creative ideas to life with Comfy Cloud. Build and run your workflows to generate stunning images and videos instantly using powerful GPUs — all from your browser, no installation required.'
 const VITE_OG_IMAGE = `${VITE_OG_URL}/assets/images/og-image.png`
 const VITE_OG_KEYWORDS = 'ComfyUI, Comfy Cloud, ComfyUI online'
+const GTM_CONTAINER_ID = 'GTM-NP9JM6K7'
+const GTM_SCRIPT = `(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+})(window,document,'script','dataLayer','${GTM_CONTAINER_ID}');`
+const GTM_NO_SCRIPT =
+  `<iframe src="https://www.googletagmanager.com/ns.html?id=${GTM_CONTAINER_ID}"` +
+  ' height="0" width="0" style="display:none;visibility:hidden"></iframe>'
 
 // Auto-detect cloud mode from DEV_SERVER_COMFYUI_URL
 const DEV_SERVER_COMFYUI_ENV_URL = process.env.DEV_SERVER_COMFYUI_URL
@@ -416,7 +425,33 @@ export default defineConfig({
             }
           })
         ]
-      : [])
+      : []),
+    // Google Tag Manager (cloud distribution only)
+    {
+      name: 'inject-gtm',
+      transformIndexHtml: {
+        order: 'post',
+        handler(html) {
+          if (DISTRIBUTION !== 'cloud') return html
+
+          return {
+            html,
+            tags: [
+              {
+                tag: 'script',
+                children: GTM_SCRIPT,
+                injectTo: 'head-prepend'
+              },
+              {
+                tag: 'noscript',
+                children: GTM_NO_SCRIPT,
+                injectTo: 'body-prepend'
+              }
+            ]
+          }
+        }
+      }
+    }
   ],
 
   build: {